When Gould was investigating the plains in the interior, he saw the Waved Parrots flying about, and remained for some time in the vicinity, in order to observe their habits and mode of life. They came in flocks of from twenty to one hundred to a small lake to drink, and from this locality flew at stated times over the plain in search of the seeds which are their exclusive food; they went to the water in the greatest numbers in the early morning, or as it grew dark in the evening. During the heat of the day they sat motionless under the leaves of the gum-trees, the holes of which were just then occupied by the pairs who were laying, and as long as they remained quiet, were with difficulty perceptible. When going to the stream, they alighted freely in large flocks upon the dead twigs of the Eucalypti, or on the branches that hung down to the water. Their activity is wonderful, and their flight very rapid, resembling that of the falcon or swallow; they run upon the ground with facility, but their feet are ill adapted for climbing among the branches of trees. When on the wing they utter a screaming cry; and whilst perched amuse each other with a caressing kind of twitter, which might almost be termed a song. The Waved Parrot congregates in parties, even during the breeding-time, although pairs are easily distinguished by their faithful devotion to each other. The nest is made in the holes and fissures of gum-trees, and in December contains from four to six eggs of a pure white colour and somewhat round shape. By the end of December the young have flown out and are capable of providing for themselves; they then collect in great flocks, that fly about in company with the old birds. As soon as the breeding-time is over, the flocks begin their migrations, during which they pass regularly from south to north, and only return to their breeding-place when the grass-seeds are ripe. Throughout South Australia they appear in spring, and also in autumn, with the same precision as our migratory birds. Some years ago only solitary Waved Parrots were occasionally seen amongst us; but at the present time every ship brings hundreds to Europe. Before leaving Australia, the captives are put together in wooden cages, the perches of which are placed like little flights of steps above each other, so as to hold a great number of birds in the smallest possible space. Such a travelling bower presents a most amusing appearance; the whole party sits in lines, so that one row of faces appears above the heads of another, and all eyes are fixed upon an observer, as they seem to beg to be freed from their confinement. Quarrels and strife have never been observed among them, and until breeding-time, thousands live most comfortably together, those of the same sex as happily as the little pairs do. We have seen one of the large cages of a bird merchant, that had formed part of a cargo of these birds, and contained more than a thousand pairs, all of which lived in great harmony.